Hi,
First, if you do not own your own home, I'd use that money and get an FHA 203K Remodel loan on a home for yourself. 3.5% down payment would enable you to buy a $100,000 property and still pay for closing costs and take your family out to dinner and have a little left for emergencies. Just make sure to research and buy the perfect deal. You should be able to, at minimum, build $50,000 equity fairly easily after repairs are done, combined with the record low interest rates and tax benefits its a no brainer.
If you do already own your own home, you can still do a FHA Remodel loan to buy an investment property, but I believe the required down payment is higher, like 10% or 20%. In that case, if you can find a house for 20-30k that is not a disaster in the "hood", then go for it. But that is going to be a lot harder to find. However, with the low rates that are out there, it would be difficult not to cashflow on properties in that price range.
I don't recommend getting an unsecured personal loan. One, it would be almost impossible, and two - the interest rates would back you into a corner where you "have to sell", and this is not the time to sell.
If you can find another investor to work with, its not a bad idea. Making money in Real Estate is hard work, mainly because of all the little problems you don't expect. Working with a seasoned investor would allow you learn from their past mistakes, and that is invaluable. But - partnerships are hard work too. Another option - stick that money in a bank account for emergencies. Then find a seasoned investor and ask to be his shadow for 6 months. Learn all you can, without risking your money. Then jump into the game.
So to sum up - 1st choice - Buy your own house and hold. 2nd- Buy a low-down cheap rental and hold (or offer it as a "Rent to own" to the renters and maybe sell. 3rd - find a mentor to work with.
Good luck! Keep us posted with what you decide to do.